A group of 13 Plane Stupid campaigners who caused 25 flight cancellations after breaking in to Heathrow Airport 's north runway have been found guilty today of aggravated trespass and entering a security restricted area.

The seven men and six women cut a hole in a fence and chained themselves to railings on the north runway, beginning at around 3.30am on July 13 2015.

As the verdict was read out, one defendant shouted: "This is a farce!", as other gasped in disbelief.District Judge Wright has told defendants they can expect jail sentences for their actions.

During their three-day trial at Willesden Magistrates' Court, defendants told of how they carried out the pre-planned action in order to 'save lives', using the defence of necessity.

The protesters claimed their actions were necessary and reasonable in order to reduce carbon emissions and halt climate change.

Mr McGhee, prosecuting, said: “Why do you feel that your conscience entitles you to break the law?”To which Mr Thompson replied: “In the context of this situation, breaking the law was not the most serious issue at hand.”